JP2007274155A - Unit and program for data collection - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To collect data from each sub-station uniformly and impartially, when collecting data successively from a plurality of sub-stations by means of a polling scheme. <P>SOLUTION: A centralized monitoring table storage 104 stores a centralized monitoring table in which an influence monitoring station is registered as necessary for centralized monitoring. When data are collected from the sub-station by lines 109-1 and 109-2, a collection time storage 105 stores the collection time thereof. A collection sequence decision part 106 confirms whether or not any sub-station necessary for centralized monitoring exists by referring to the centralized monitoring table stored in the centralized monitoring table storage 104. If there is neither a sub-station to be monitored in a centralized manner, nor a sub-station currently under control; the collection sequence decision part 106 decides the collection sequence, by referring to the collection time storage 105, so that the data are collected successively from a sub-station of which previous data collection time is the oldest. Also, if there is a sub-station to be monitored in a centralized manner or a sub-station currently under control, the collection sequence decision 106 decides the collection sequence giving priority to such the sub-station. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a data collection apparatus and a data collection program for collecting data by sequentially assigning a smaller number of lines from a plurality of slave stations to each slave station, and in particular, data in order from a plurality of slave stations by a polling method. The present invention relates to a data collection device and a data collection program that can collect data uniformly from each slave station when collecting data.

  In general, agricultural lands such as large-scale fields can have irrigation canals running in a mesh. In such irrigation canals, facilities such as gates and pumps are laid at important points, and the amount of water is adjusted to prevent the occurrence of floods and droughts. By the way, the scale of the irrigation channel becomes larger as the agricultural land becomes larger, and the number of gates and pumps to be laid increases. For this reason, it is desired to efficiently monitor gates and pumps and change in the amount of water, particularly in large-scale agricultural land.

  Therefore, for example, as described in Non-Patent Document 1, an irrigation channel management system including a central management station and a plurality of slave stations may be introduced. In this irrigation channel management system, control commands such as gates and pumps are sent from the management station to each slave station, and the slave stations operate the gates and pumps belonging to the own station according to the control commands. In addition, each slave station collects data such as the water level and flow rate at its own station and sends this data to the management station. The management station centralizes control of the facilities for the entire irrigation channel and data collection. Can be managed.

  Since such an irrigation channel management system is generally expensive to introduce, a polling method such as the 2: N polling method disclosed in Patent Document 1, for example, is adopted as a communication method between the management station and the slave station. Cost may be reduced. 2: In the N polling method, even if the number of slave stations (N) is 3 or more, the management station communicates with each slave station in turn using only two lines, and transmits control commands to the slave stations and Data reception from the station is executed. Therefore, for example, while a control command is being transmitted to one slave station, one slave line is occupied by this slave station. Therefore, data reception from other slave stations is performed using the remaining one slave line. It will be done sequentially. Further, in a normal time when control command transmission is not executed for any of the slave stations, the entire slave station is divided into two groups each having a half, and data reception is sequentially performed through a line assigned to each group.

"Waterway management system" FUJITSU DENSO REVIEW vol.17 February 2002 Vol.11 No.1 JP 61-098040 A

  However, when data collection from a slave station is performed by the 2: N polling method, data collection from a specific slave station may not be executed for a long time if the order in which the slave stations use the line is fixed. There is a problem. In other words, if the state in which control of the slave station accompanying the occupation of one line occurs and the normal state in which the slave stations divided into two groups each use the line in a fixed order are repeated, depending on the timing at which the control occurs May cause a slave station that cannot use the line for a long time.

  Of course, data cannot be collected from a slave station that cannot use the line for a long time. Especially in the irrigation channel management system, the discovery of water level abnormalities is delayed, resulting in flood damage such as flooding. May occur. Specifically, for example, if the slave station immediately downstream of the slave station to be controlled cannot use the line for a long time, the water level and flow rate in the slave station immediately downstream will be significantly changed by the control. Data collection from this slave station is delayed, and abnormalities in water level and flow rate at the slave station immediately downstream may not be found.

  The present invention has been made in view of the above points, and when collecting data sequentially from a plurality of slave stations by a polling method, a data collection device and data that can collect data evenly and uniformly from each slave station The purpose is to provide a collection program.

  In order to solve the above-mentioned problem, the present invention is a data collection device that collects data by sequentially assigning a smaller number of lines from a plurality of slave stations to each slave station, and collects data for each slave station. A storage means for storing the collected collection time, a determination means for determining a collection order in which a line is allocated earlier to a slave station having a collection time stored in the storage means, and a child in the collection order determined by the determination means. And collecting means for collecting data from the station.

  Further, the present invention is the above invention, wherein the determining means includes a specifying means for specifying an influence monitoring station that requires centralized monitoring among a plurality of slave stations, and the influence monitoring station specified by the specifying means is prioritized. And determining the collection order.

  Also, the present invention is characterized in that, in the above-mentioned invention, the determination means determines the collection order by causing the influence monitoring station designated by the designation means to occupy one line.

  Also, in the present invention according to the above-mentioned invention, the determining means may increase the frequency that the line is assigned to the influence monitoring station designated by the designation means higher than the frequency that the line is assigned to a slave station other than the influence monitoring station. Features.

  Further, the present invention is the above invention, wherein the specifying means includes a definition table that defines a combination of a change related to a slave station and a slave station that requires centralized monitoring in accordance with the change, a situation for each slave station, or Determining means for determining whether central monitoring is necessary or not by referring to the definition table from the collected data for each slave station, and a centralized monitoring table for storing the slave station determined to require centralized monitoring by the determining means as an influence monitoring station It is characterized by including.

  Also, the present invention is characterized in that, in the above-mentioned invention, the definition table defines a combination of a control for a slave station and a slave station affected by the control.

  Further, the present invention is characterized in that, in the above-mentioned invention, the definition table defines a combination of an abnormal state in a slave station and a slave station affected by the abnormal state.

  Also, the present invention is characterized in that, in the above-mentioned invention, the definition table defines a combination of a change in collected data from a slave station and a slave station affected by the change in the collected data.

  Further, the present invention is a data collection device for collecting data by sequentially assigning a smaller number of lines from a plurality of slave stations to each slave station, and monitoring the influence that requires centralized monitoring among the plurality of slave stations Specifying means for designating stations, storage means for storing the collection time for collecting data for each slave station, and after determining the collection order for collecting data from the influence monitoring stations designated by the designation means, other than the influence monitoring stations Determining means for determining the collection order in which data is collected in order from the slave station having the oldest collection time stored in the storage means, and collecting data from the slave stations in the order of collection determined by the determining means And a collecting means.

  Further, the present invention is a data collection program for collecting data by sequentially assigning a smaller number of lines from a plurality of slave stations to each slave station and collecting the data for each slave station in a computer A storage step for storing the time, a determination step for determining a collection order in which a line is assigned earlier to a slave station having an older collection time stored in the storage step, and a slave station in the collection order determined in the determination step And a collection step of collecting data from the data.

  Further, the present invention is a data collection program for collecting data by sequentially assigning a smaller number of lines than the number of slave stations from a plurality of slave stations to each slave station, and collecting time for collecting data for each slave station in a computer A storage step for storing data, a designation step for designating an influence monitoring station that requires centralized monitoring among a plurality of slave stations, and a collection order for collecting data from the influence monitoring stations designated in the designation step A first determination step, a second determination step of determining a collection order in which data is collected in order from a child station other than the influence monitoring station and having a collection time stored in the storage step, and the first determination step; And a collection step of collecting data from the slave stations in the collection order determined in the second determination step.

  According to the present invention, a collection time at which data is collected for each slave station is stored, a collection order in which a line is allocated earlier for a slave station having a stored collection time earlier, and the slave station is determined in the determined collection order. Collect data from For this reason, the slave station with the older previous data collection time collects the next data earlier, and when collecting data sequentially from a plurality of slave stations by the polling method, collects data uniformly from each slave station. be able to.

  In addition, according to the present invention, an influence monitoring station that requires centralized monitoring among a plurality of slave stations is designated, and the collection order is determined with priority on the designated influence monitoring station. Foreseeable impact monitoring stations can be intensively monitored. For example, in irrigation channel management systems, dangers such as floods and droughts can be detected early.

  Further, according to the present invention, since the designated influence monitoring station occupies one line and determines the collection order, the influence monitoring station can always be monitored, and the data change in the influence monitoring station can be reliably monitored. can do.

  In addition, according to the present invention, in order to make the frequency that the line is assigned to the designated influence monitoring station higher than the frequency that the line is assigned to the slave station other than the influence monitoring station, Data collection of other slave stations can also be performed, and data collection from all the slave stations can be performed uniformly.

  Further, according to the present invention, a definition table that defines a combination of a change related to a slave station and a slave station that requires centralized monitoring according to the change is stored, and a situation for each slave station or a collection for each slave station The definition table is referred to from the data to determine whether central monitoring is necessary or not, and the slave station determined to require central monitoring is stored as an impact monitoring station. For this reason, not only a slave station whose collected data has actually changed, but also a slave station that is affected by the change can be an impact monitoring station, and other slave stations that are affected by a change in one slave station can also be used. The collection order can be determined by reflection.

  Further, according to the present invention, since the definition table defines a combination of the control for the slave station and the slave station affected by the control, the slave station whose situation is changed by the control is centrally monitored. In the management system, the water level and the flow rate at the position affected by the operation of the gate and the pump can be intensively monitored.

  Further, according to the present invention, the definition table defines a combination of an abnormal state in the slave station and a slave station that is affected by the abnormal state, so that the slave station whose situation changes due to an abnormality such as a failure can be centrally monitored. Thus, for example, in the irrigation channel management system, the water level and the flow rate at the position affected by the failure of the gate and the pump can be intensively monitored.

  Further, according to the present invention, the definition table defines a combination of a change in the collected data from the slave station and a slave station that is affected by the change in the collected data, so that the situation changes due to a significant change in the collected data. The slave stations will be centrally monitored. For example, in the irrigation channel management system, the water level and the flow rate at the position affected by the heavy rain upstream can be intensively monitored.

  Further, according to the present invention, an influence monitoring station that requires centralized monitoring among a plurality of slave stations is designated, a collection time for collecting data for each slave station is stored, and data is collected from the designated influence monitoring station After determining the collection order to be collected, determine the collection order to collect data in order from the slave stations other than the impact monitoring station whose stored collection time is the oldest, and collect data from the slave stations in the determined collection order To do. For this reason, since the slave station with the previous previous data collection time is prioritized next to the influence monitoring station, data collection is performed. Therefore, the fairness of the data collection order can be ensured simultaneously with the necessary centralized monitoring.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In the following, the case where the 2: N polling method is adopted in the irrigation channel management system provided with a gate and a pump will be described as an example. However, the present invention is not limited to data collection other than the irrigation channel management system. It can also be applied when a polling method other than the polling method is adopted.

  FIG. 1 is a block diagram showing a schematic configuration of the irrigation channel management system according to the present embodiment. As shown in the figure, the irrigation channel management system according to the present embodiment includes a management station 10 having two communication lines and a slave station 20-1 each having a gate and a pump for data collection and control commands. ~ 20-N.

  The management station 10 has a data collection device having two communication lines, and collects data such as water level and flow rate in order from the slave stations 20-1 to 20-N. When the control of the gates and pumps belonging to each of the slave stations 20-1 to 20-N is necessary, the management station 10 assigns one of the lines to the slave station that needs to be controlled, and transmits a control command. .

  The management station 10 collects data from each of the slave stations 20-1 to 20-N when there is no slave station that needs to be controlled. At this time, the data collection device does not collect data for a long time. In order not to generate a station, a line is allocated in preference to the slave station having the oldest previous collection time so that the data collection order becomes fair. In addition, when a control command is sent to any of the slave stations, or when data changes in any of the slave stations become large, the data collection device will change the water level, flow rate, etc. for the time being depending on the control and natural conditions. A slave station that is thought to be large is used as an impact monitoring station, and the frequency of data collection by the impact monitoring station is increased and centralized monitoring is performed. The data collection order determination in these data collection devices will be described in detail later.

  The slave stations 20-1 to 20 -N transmit data such as the water level and flow rate at the local station to the management station 10 at the timing when the communication line is allocated from the management station 10. At this time, if an abnormality such as a failure has occurred in the slave station 20-1 to 20 -N, or the gate or pump belonging to the slave station, the slave station 20-1 to 20 -N sends an abnormality notification signal to that effect along with the data to the management station 10. Send. Further, when the control command from the management station 10 is received, the slave stations 20-1 to 20-N control the gates and pumps belonging to the own station according to the control command. The slave station that is controlling the gate and pump occupies one of the two communication lines. FIG. 1 shows a state where each of the slave stations 20-1 and 20-3 connected to the management station 10 by a solid line uses one line.

  FIG. 2 is a block diagram showing a main configuration of the data collection device provided in the management station 10 according to the present embodiment. 2 includes a definition table storage unit 101, a centralized monitoring determination unit 102, a control instruction unit 103, a centralized monitoring table storage unit 104, a collection time storage unit 105, a collection order determination unit 106, a line allocation table 107, It has a line assignment unit 108 and line units 109-1 and 109-2.

  The definition table storage unit 101 is a definition in which changes in the statuses of the slave stations 20-1 to 20-N and influence monitoring stations that should perform centralized monitoring with priority given to data collection when the status changes are defined in advance. Remember the table. Specifically, the definition table storage unit 101 has three types of definition tables: a control priority table 101a, a state change priority table 101b, and a data change priority table 101c.

  In the control priority table 101a, for example, as shown in FIG. 3A, the contents of control in each slave station are defined in association with the influence monitoring stations affected by the control of this slave station, and the control is executed. In this case, it is possible to grasp the influence monitoring station that requires centralized monitoring corresponding to this control. That is, for example, in FIG. 3A, when controlling the A gate belonging to the slave station 1, the water level at the B point is affected, so the slave station 3 at the B point becomes the influence monitoring station. Since the end condition is that the water level change is less than 0.1, the slave station 3 is centrally monitored until the water level change is less than 0.1. In other words, the frequency at which a line is assigned to the slave station 3 is increased. For example, one line is occupied by the slave station 3, or a line is assigned to the slave station 3 once every two times. .

  In the state change priority table 101b, for example, as shown in FIG. 3-2, an abnormality such as a failure in each child station and an influence monitoring station affected by the abnormality of the child station are defined in association with each other. When a state change such as an abnormality occurs in a station, it is possible to grasp an influence monitoring station that requires centralized monitoring in response to the abnormality of the slave station. That is, for example, in FIG. 3B, when the abnormal state A is affirmed (turned ON) in the slave station 1, only the slave station 1 that is its own station becomes the influence monitoring station. Since the termination condition is that the abnormal state A is denied (turns OFF), the slave station 1 is centrally monitored until the abnormal state A is resolved.

  In the data change priority table 101c, for example, as shown in FIG. 3C, the collected data such as the water level and the flow rate in each slave station is associated with the influence monitoring station affected by the change in the collected data of the slave station. If the data collected by the slave station meets the specified conditions and the data changes, it is possible to identify the impact monitoring station that requires centralized monitoring corresponding to the collected data of the slave station. Yes. That is, for example, in FIG. 3C, when the change in the previous value and the current value of the water level in the slave station 1 exceeds the specified value 0.10, the slave station 1 and the slave station 5 that are own stations become the influence monitoring stations. Since the end condition is that the water level change between the previous value and the current value is less than the specified value 0.02, the slave stations 1 and 5 are centrally monitored until the water level change becomes less than the specified value 0.02. Will be. Various starting conditions and ending conditions for centralized monitoring in the data change priority table 101c are conceivable in addition to those described above. For example, centralized monitoring is performed depending on whether the difference between collected data and a predetermined value exceeds a predetermined threshold. It is good also as conditions, such as starting.

  Note that the influence monitoring stations defined in these definition tables may include the slave station itself to be controlled and the slave station itself in which the state change or data change has occurred, or one control, state change, and data. A plurality of influence monitoring stations may be defined for the change. Further, the influence monitoring station may be located upstream or downstream of the slave station where control, state change, and data change occur.

  The centralized monitoring determination unit 102 transmits control commands to the slave stations 20-1 to 20-N and receives control data stored in the definition table storage unit 101 when receiving collected data from the slave stations 20-1 to 20-N. The centralized monitoring reservation table 104a stored in the centralized monitoring table storage unit 104 or the immediate centralized monitoring is selected by referring to the table 101a, the state change priority table 101b, and the data change priority table 101c to select the influence monitoring station that needs centralized monitoring. The table 104b is updated.

  Specifically, when receiving a notification indicating that any of the slave stations is controlled and the content of the control from the control instruction unit 103, the centralized monitoring determination unit 102 assigns the influence monitoring station corresponding to the control content to the control priority table 101a. And the time for starting the centralized monitoring of the influence monitoring station is registered in the centralized monitoring reservation table 104a. At this time, the centralized monitoring determination unit 102 divides the distance between the slave station on which the control is executed and the influence monitoring station by the flow velocity at the slave station on which the control is executed, so that the influence due to the control reaches the influence monitoring station. The time is calculated and the time at which centralized monitoring should be started is registered in the centralized monitoring reservation table 104a.

  When the collected data or the abnormality notification signal is output from the line units 109-1 and 109-2, the centralized monitoring determination unit 102 selects the influence monitoring station corresponding to the abnormality notification signal from the state change priority table 101b. Then, the influence monitoring station corresponding to the collected data is selected from the data change priority table 101c, and the selected influence monitoring station is registered in the immediate centralized monitoring table 104b as an influence monitoring station that immediately starts centralized monitoring.

  When the control instruction unit 103 controls the gates and pumps belonging to the slave stations 20-1 to 20-N, the control instruction unit 103 collects the controlled slave station to occupy one of the line unit 109-1 or the line unit 109-2. Instructs the order determination unit 106. Then, the control instruction unit 103 outputs the control content to the line allocation unit 108. Furthermore, the control instruction unit 103 notifies the centralized monitoring determination unit 102 of the slave station to be controlled and the content of the control.

  The centralized monitoring table storage unit 104 stores a centralized monitoring table in which influence monitoring stations that require centralized monitoring are registered. Specifically, the centralized monitoring table storage unit 104 stores a centralized monitoring reservation table 104a and an immediate centralized monitoring table 104b.

  The centralized monitoring reservation table 104a stores an influence monitoring station that needs centralized monitoring in the future by controlling gates and pumps. That is, the centralized monitoring reservation table 104a stores a combination of the influence monitoring station defined by the control priority table 101a and the time when the influence of control reaches the influence monitoring station.

  The immediate centralized monitoring table 104b stores an influence monitoring station that requires immediate centralized monitoring due to an abnormality such as a failure of a slave station or a change in natural conditions. That is, the immediate centralized monitoring table 104b stores an influence monitoring station defined by the state change priority table 101b and the data change priority table 101c.

  The collection time storage unit 105 stores the collection time when data is collected from the slave stations 20-1 to 20 -N by the line units 109-1 and 109-2. At this time, the collection time storage unit 105 does not need to distinguish which of the line units 109-1 and 109-2 has collected the data, and simply stores the time at which the data was collected from each slave station in time series. Just do it. It is assumed that the slave station under control occupies either of the line sections 109-1 and 109-2 and data is collected as needed along with the control. Therefore, the collection time storage unit 105 also stores the time when data is collected from the slave station being controlled.

  The collection order determining unit 106 refers to the centralized monitoring reservation table 104a and the immediate centralized monitoring table 104b stored in the centralized monitoring table storage unit 104 to check whether there is a slave station that needs centralized monitoring, and performs centralized monitoring. If there are no slave stations to be controlled and slave stations under control, the collection time storage unit 105 is referred to, and the collection order is determined so that data collection is performed in order from the slave station having the oldest data collection time. Further, if there is a slave station that is centrally monitored or a slave station that is being controlled, the collection order determination unit 106 prioritizes these slave stations and determines the collection order. That is, for example, each slave station to be centrally monitored and a slave station under control occupy one line, and if there is an empty line, the empty lines are allocated in order from the slave station having the oldest data collection time. Note that the controlled slave station occupies one line. However, the slave station to be centrally monitored does not occupy one line completely, but increases the frequency of data collection, for example, once every two times. The collection order in which lines are allocated at a rate of times may be determined. The collection order determined by the collection order determination unit 106 is output to the line allocation table 107.

  The line assignment table 107 stores the order of the slave stations assigned to the line units 109-1 and 109-2. That is, as shown in FIG. 4, for example, the line allocation table 107 indicates the order of the slave stations that communicate using the line # 1 corresponding to the line unit 109-1 and the line # 2 corresponding to the line unit 109-2. I remember it. This order is determined by the collection order determination unit 106, and in principle, either the line # 1 or the line # 2 is assigned in the order of the previous data collection time. However, as illustrated in FIG. 4, for example, the slave station 5 under control occupies the line # 1 in the first and second orders, and the slave stations 6 and 9 for which centralized monitoring is reserved. Is preferentially using line # 2 in the third to sixth order.

  The line assignment unit 108 designates a slave station that is a communication partner of the line unit 109-1 and the line unit 109-2 according to the line assignment table 107, and executes data collection from the slave station. In addition, when the control content is notified from the control instruction unit 103, the line allocation unit 108 transfers a control command indicating the control content to any of the line units allocated to the controlled slave station. , Send to the slave station.

  Each of the line units 109-1 and 109-2 has one line. In accordance with an instruction from the line assignment unit 108, the collected data is transmitted from the slave station to which the line is assigned, and the transmitted collected data is received. To do. In addition, when a control command is transferred from the line allocation unit 108, the line units 109-1 and 109-2 transmit the control command to the slave station to which the line is assigned, and continuously collect data from the slave station. To send. When the collected data is received, the line units 109-1 and 109-2 notify the collection time storage unit 105 of the slave station that has transmitted the collected data, and outputs the collected data to the centralized monitoring determination unit 102. To do.

  Next, the data collection order determination operation by the data collection apparatus configured as described above will be described with reference to the flowchart shown in FIG.

  As described above, the data collection order in this embodiment is determined by the collection order determination unit 106 in order from the slave station having the previous data collection time in principle, in ascending order. However, in the present embodiment, an influence monitoring station that requires centralized monitoring is further determined based on the control of the slave station, the failure of the slave station, and natural conditions, and the influence monitoring station has priority in the data collection order.

  The centralized monitoring determination unit 102 determines whether there is an influence monitoring station that needs centralized monitoring. That is, the centralized monitoring determination unit 102 determines whether or not a control instruction for controlling the gate and pump in the slave station has been issued from the control instruction unit 103 (step S101). The centralized monitoring determination unit 102 refers to the control priority table 101a of the definition table storage unit 101, and the influence monitoring station is registered in the centralized monitoring reservation table 104a (step S102). This update of the centralized monitoring table (centralized monitoring reservation table 104a) will be described in detail later.

  Then, after updating the centralized monitoring table or when a control instruction is not issued from the control instruction unit 103, the centralized monitoring determination unit 102 continuously collects data from any of the slave stations in the line units 109-1 and 109-2. It is determined whether or not it has been done (step S103). When data is collected, the centralized monitoring determination unit 102 refers to the state change priority table 101b and the data change priority table 101c of the definition table storage unit 101, and the influence monitoring station is registered in the immediate centralized monitoring table 104b (step). S104). This centralized monitoring table (immediate centralized monitoring table 104b) update will also be described in detail later.

  With the above processing, the update of the centralized monitoring table (that is, the centralized monitoring reservation table 104a and the immediate centralized monitoring table 104b) stored in the centralized monitoring table storage unit 104 is completed, and the collection order determination unit 106 determines the data collection order. Will be started. The centralized monitoring table is updated by the centralized monitoring determination unit 102 at any time, and when the control instruction is issued from the control instruction unit 103 or the collected data is received by the line units 109-1 and 109-2. In the case, the centralized monitoring table is updated.

  When the data collection order is determined by the collection order determination unit 106, it is first determined whether or not there is a slave station under control based on the presence / absence of a control instruction from the control instruction unit 103 (step S105). If there is a slave station, the collection order determining unit 106 determines that the slave station being controlled occupies one line, and determines the data collection order of the slave stations being controlled (step S106). At this point, since it is unclear how long control for the slave stations will continue, the collection order determination unit 106 provisionally assumes that all slave stations other than those currently under control use empty lines in order.

  Further, after determining the collection order of the slave stations being controlled or when there is no slave station being controlled, the collection order determination unit 106 refers to the immediate centralized monitoring table 104b of the centralized monitoring table storage unit 104 and performs the centralized monitoring. It is determined whether there is an influence monitoring station (step S107). If there is an influence monitoring station under centralized monitoring, the collection order determining unit 106 determines that data is preferentially collected from the influence monitoring station under centralized monitoring. For example, the influence monitoring station assumes that the influence monitoring station occupies one line. The station data collection order is determined (step S108). At this time, since it is unclear how long the centralized monitoring for the influence monitoring station will continue, the collection order determining unit 106 tentatively determines the frequency at the time of the centralized monitoring (for example, all orders of one line or twice of one line). The order of the influence monitoring stations is determined on the assumption that a line is continuously assigned to the influence monitoring station.

  Then, after determining the collection order of the slave stations under centralized monitoring or when there is no slave station under centralized monitoring, the centralized monitoring reservation table 104a in the centralized monitoring table storage unit 104 is referred to by the collection order determining unit 106, and the centralized monitoring is performed. It is determined whether or not there is an influence monitoring station reserved (step S109). If there is an influence monitoring station for which centralized monitoring is reserved, the collection order determining unit 106 determines that data is preferentially collected from the influence monitoring station after the time when the start of centralized monitoring is reserved. Assuming that the station occupies one line, the data collection order of the influence monitoring station is determined (step S110). At this time, since the time required for data collection by the line units 109-1 and 109-2 is almost constant, the order in which priority should be given to the data collection of the influence monitoring station is found from the time when the centralized monitoring is started. To do. At this time, since it is unknown how long the centralized monitoring for the influence monitoring station will continue, the collection order determining unit 106 determines the frequency at the time of the centralized monitoring for the influence monitoring station (for example, all orders of one line or one line). The order of the influence monitoring stations is determined on the assumption that a line is continuously allocated to the influence monitoring station in the order of once every two times.

  With the above processing, since the data collection order of the slave stations that are preferentially collected such as the slave station being controlled and the influence monitoring station is determined, the collection time storage is subsequently performed by the collection order determination unit 106. The unit 105 is referred to, and the vacant order is filled so that the next data collection is performed in order from the slave station having the oldest data collection time (step S111). When the collection order determination unit 106 determines the data collection order of the influence monitoring stations with reference to the centralized monitoring table as described above, when centralized monitoring of a plurality of influence monitoring stations is executed at the same time, By referring to the collection time storage unit 105, priority may be given to the influence monitoring station having the oldest data collection time.

  Then, the collection order determination unit 106 registers the determined data collection order in the line assignment table 107, and updates the line assignment table 107 (step S112). As described above, in principle, the collection order is determined so that the next data collection is performed with priority given to the old slave station from the previous data collection time, but the controlled slave station and slave stations are controlled and For influence monitoring stations that require centralized monitoring due to station failures or natural conditions, the frequency of data collection is determined so that priority is given further. For this reason, data can be collected evenly and fairly from each slave station, and data in the slave stations considered to have large changes in water level and flow rate can be centrally monitored to prevent floods and droughts.

  Next, the update operation of the centralized monitoring table (that is, the centralized monitoring reservation table 104a) when the slave station is controlled will be described with reference to the flowchart shown in FIG.

  When it is determined by the user that control of a gate or pump belonging to any of the slave stations is necessary, a command instructing this control is accepted by the control instruction unit 103 (step S201), and control is executed from the control instruction unit 103. When the notification is made, the collection order determination unit 106 determines the allocation of the line to the slave station to be controlled. Then, a control command indicating the content of the control output from the control instruction unit 103 is transferred to the line unit of the allocated line by the line allocation unit 108, and the control command is transmitted from the line unit to the slave station. The gate and pump belonging to the slave station are controlled (step S202).

  Further, the control instruction unit 103 notifies the centralized monitoring determination unit 102 that the slave station control is executed, and the centralized monitoring determination unit 102 refers to the control priority table 101a. Then, the influence monitoring station corresponding to the slave station to be controlled notified from the control instruction unit 103 and the content of the control is selected (step S203). The centralized monitoring determination unit 102 divides the distance from the controlled slave station to the influence monitoring station by the flow velocity acquired at the previous data collection in the controlled slave station, thereby monitoring the influence of the control. The time required to reach the station is calculated (step S204). Specifically, for example, when the gate belonging to the slave station to be controlled is opened, the amount of water increases and the water level becomes higher downstream of the gate, but the time for this water level change to reach the influence monitoring station is calculated. It is possible to do.

  Then, the centralized monitoring determination unit 102 determines to start centralized monitoring of the impact monitoring station from the impact arrival time at the impact monitoring station, and the central monitoring reservation table 104a starts the centralized monitoring with the impact monitoring station (influence Arrival time) is registered (step S205). Thereby, when control is performed on any of the slave stations, the update of the centralized monitoring table (centralized monitoring reservation table 104a) for centrally monitoring the influence monitoring stations affected by this control is completed.

  Next, the update operation of the centralized monitoring table (that is, the immediate centralized monitoring table 104b) when data from the slave station is collected will be described with reference to the flowchart shown in FIG.

  When data from the slave station is collected by the line units 109-1 and 109-2 in accordance with an instruction from the line allocation unit 108 (step S301), the fact is notified to the collection time storage unit 105, and the collection time storage unit By 105, the data collection time for each slave station is stored (step S302). The collected data is output to the centralized monitoring determination unit 102, and if there is a slave station that is performing centralized monitoring, it is determined whether or not the centralized monitoring end condition is satisfied (step S303).

  That is, when data is collected from a slave station that is under centralized monitoring, the centralized monitoring determination unit 102 determines that the change between the current collected data and the previous collected data is a control priority table 101a, a state change priority table 101b, and It is confirmed whether each end condition of the data change priority table 101c is met. Specifically, for example, when the control priority table 101a shown in FIG. 3A is stored in the definition table storage unit 101, if the slave station 3 is centrally monitored, in the collected data from the slave station 3, When the change between the previous water level and the current water level is less than 0.1, the condition for terminating the centralized monitoring of the slave station 3 is established.

  Similarly, in the state change priority table 101b shown in FIG. 3B, the condition for termination of centralized monitoring is established when the abnormality notification signal is no longer included in the collected data from the slave station. Further, in the data change priority table 101c shown in FIG. 3-3, when the change in the previous value and the current value of the water level, the flow rate, or the rainfall is less than the specified value indicating the end condition, the central monitoring end condition is set. It will be established. Here, the end condition is a change between the previous value and the current value, but various other end conditions can be considered.

  In addition, as an ending condition, the central monitoring determination unit 102 reads out the previous data collection time from the collection time storage unit 105 instead of focusing only on the change between the previous value and the current value. An end condition focusing on the amount of change may be set. Such condition setting can also be applied to the start condition of the data change priority table 101c. By paying attention to the amount of change per unit time, the change in data can be more accurately reflected in the centralized monitoring.

  As a result of confirming the termination condition by the centralized monitoring determination unit 102, if the centralized monitoring of the slave station collected this time is to be terminated, the centralized monitoring determination unit 102 determines whether the registration of the slave station is performed by the centralized monitoring reservation table 104a or immediately. It is deleted from the centralized monitoring table 104b (step S304). As a result, when the data collection order is determined by the subsequent collection order determination unit 106, the slave stations that have been centrally monitored are not given priority.

  Then, after the registration deletion of the slave station under centralized monitoring or when the condition for termination of centralized monitoring is not satisfied, the status change is made to the slave station by checking whether the collected data contains an abnormality notification signal. It is determined whether or not there has been (step S305). As a result, if a failure or the like occurs in the slave station and the abnormality notification signal is included in the collected data, the centralized monitoring determination unit 102 refers to the state change priority table 101b and corresponds to the slave station in which the abnormality has occurred. An influence monitoring station is selected, and this influence monitoring station is registered in the immediate centralized monitoring table 104b (step S306). If there is a state change in the slave station, it is desirable that the slave station itself in which the state has changed be an influence monitoring station.

  If there is no state change after registration of the influence monitoring station due to the state change, whether there is a data change in which the change between the current collected data and the previous collected data is equal to or greater than the specified value of the data change priority table 101c. It is determined whether or not (step S307). As a result, if a data change has occurred, the centralized monitoring determination unit 102 refers to the data change priority table 101c, selects an influence monitoring station corresponding to the child station where the data change has occurred, and this influence monitoring station It is registered in the immediate centralized monitoring table 104b (step S308). When there is a data change, it is desirable that the slave station itself in which the data change has occurred be an influence monitoring station. In addition, as described above, instead of simply determining whether the change value between the previous collection data and the current collection data is greater than or equal to the specified value, the change value is divided by the time elapsed since the last data collection. Alternatively, it may be determined whether or not there has been a data change based on the amount of change per unit time.

  As described above, by registering the influence monitoring stations to be centrally monitored in the centralized monitoring reservation table 104a and the immediate centralized monitoring table 104b, it is possible to clearly distinguish the slave stations that preferentially execute data collection. It is possible to focus on monitoring the slave stations that are expected to change significantly.

  As described above, according to the present embodiment, in principle, data collection is performed by assigning lines in order from the slave station with the oldest data collection time, while the slave station control, slave station abnormality, and natural conditions are performed. The influence monitoring station that needs centralized monitoring is determined by the above, and data collection is performed by preferentially allocating a line to the slave station and the influence monitoring station being controlled. For this reason, when data is collected sequentially from a plurality of slave stations by the polling method, data can be collected uniformly and fairly from each slave station. In addition, the affected slave stations are centrally monitored by the slave station control, slave station abnormalities, and natural conditions, so it is possible to detect dangers such as floods and droughts at an early stage. Can be prevented.

(Appendix 1) A data collection device that collects data by sequentially assigning a smaller number of lines from a plurality of slave stations to each slave station.
Storage means for storing a collection time at which data is collected for each slave station;
A determination unit that determines a collection order in which a line is assigned earlier to a slave station having an older collection time stored in the storage unit;
A data collecting apparatus comprising: collecting means for collecting data from the slave stations in the collection order determined by the determining means.

(Supplementary note 2)
Including designation means for designating impact monitoring stations that require centralized monitoring among multiple slave stations,
The data collection apparatus according to appendix 1, wherein the collection order is determined with priority given to the influence monitoring station designated by the designation means.

(Supplementary note 3)
The data collection apparatus according to appendix 2, wherein the influence monitoring station designated by the designation means occupies one line to determine the collection order.

(Supplementary note 4)
3. The data collection device according to claim 2, wherein the frequency at which a line is assigned to an influence monitoring station designated by the designation unit is set higher than a frequency at which a line is assigned to a slave station other than the influence monitoring station.

(Supplementary note 5)
A definition table that defines a combination of a change related to a slave station and a slave station that requires centralized monitoring according to the change;
A determination means for determining whether or not centralized monitoring is necessary by referring to the definition table from the situation for each slave station or the collected data for each slave station;
The data collection apparatus according to claim 2, further comprising: a centralized monitoring table that stores, as an influence monitoring station, a slave station that is determined to require centralized monitoring by the determination unit.

(Appendix 6) The definition table is:
The data collection device according to appendix 5, wherein a combination of a control for the slave station and a slave station affected by the control is defined.

(Appendix 7) The definition table is
The data collection device according to appendix 5, wherein a combination of an abnormal state in the slave station and a slave station affected by the abnormal state is defined.

(Appendix 8) The definition table is:
The data collection device according to appendix 5, wherein a combination of a change in the collected data from the slave station and a slave station affected by the change in the collected data is defined.

(Supplementary note 9) A data collection device that collects data by sequentially assigning a smaller number of lines from a plurality of slave stations to the number of slave stations,
A designation means for designating an impact monitoring station that requires centralized monitoring among a plurality of slave stations,
Storage means for storing a collection time for collecting data for each slave station;
After determining the collection order for collecting data from the influence monitoring station designated by the designation means, the data is collected in order from the slave stations other than the influence monitoring station whose collection times are stored in the storage means in the oldest order. A determination means for determining a collection order;
A data collecting apparatus comprising: collecting means for collecting data from the slave stations in the collection order determined by the determining means.

(Appendix 10) A data collection program for collecting data by sequentially allocating a smaller number of lines than the number of slave stations from a plurality of slave stations to each slave station,
A storage step for storing a collection time at which data is collected for each slave station;
A determination step of determining a collection order in which a line is assigned earlier as a slave station having an older collection time stored in the storage step;
And a collection step of collecting data from the slave stations in the collection order determined in the determination step.

(Appendix 11) A data collection program for collecting data by sequentially assigning a smaller number of lines than the number of slave stations to a plurality of slave stations from a plurality of slave stations,
A storage step for storing a collection time for collecting data for each slave station;
A designated process for designating an impact monitoring station that requires centralized monitoring among a plurality of slave stations;
A first determination step of determining a collection order for collecting data from the influence monitoring station designated in the designation step;
A second determination step of determining a collection order for collecting data in order from a slave station other than the influence monitoring station and having a collection time stored in the storage step in order from the oldest,
And a collection step of collecting data from a slave station in the collection order determined in the first determination step and the second determination step.

  The present invention can be applied to the case where data is collected evenly and fairly from each slave station when data is sequentially collected from a plurality of slave stations by the polling method.

It is a block diagram showing a schematic structure of a waterway management system concerning one embodiment. It is a block diagram which shows the principal part structure of the data collection device which concerns on one Embodiment. It is a figure which shows an example of the control priority table which concerns on one embodiment. It is a figure which shows an example of the state change priority table which concerns on one embodiment. It is a figure which shows an example of the data change priority table which concerns on one embodiment. It is a figure which shows an example of the line allocation table which concerns on one Embodiment. It is a flowchart which shows the data collection order determination operation | movement which concerns on one Embodiment. It is a flowchart which shows the centralized monitoring table update operation | movement at the time of control which concerns on one Embodiment. It is a flowchart which shows the centralized monitoring table update operation at the time of the data collection which concerns on one Embodiment.

Explanation of symbols

101 definition table storage unit 101a control priority table 101b state change priority table 101c data change priority table 102 central monitoring determination unit 103 control instruction unit 104 central monitoring table storage unit 104a central monitoring reservation table 104b immediate centralized monitoring table 105 collection time storage unit 106 Collection order determining unit 107 Line allocation table 108 Line allocation unit 109-1, 109-2 Line unit

Claims (5)

A data collection device that collects data by sequentially assigning a smaller number of lines than the number of slave stations to each slave station from a plurality of slave stations,
Storage means for storing a collection time at which data is collected for each slave station;
A determination unit that determines a collection order in which a line is assigned earlier to a slave station having an older collection time stored in the storage unit;
A data collecting apparatus comprising: collecting means for collecting data from the slave stations in the collection order determined by the determining means. The determining means includes
Including designation means for designating impact monitoring stations that require centralized monitoring among multiple slave stations,
2. The data collection apparatus according to claim 1, wherein the collection order is determined by giving priority to the influence monitoring station designated by the designation means. The designation means is:
A definition table that defines a combination of a change related to a slave station and a slave station that requires centralized monitoring according to the change;
A determination means for determining whether or not centralized monitoring is necessary by referring to the definition table from the situation for each slave station or the collected data for each slave station;
The data collection device according to claim 2, further comprising: a centralized monitoring table that stores, as an influence monitoring station, a slave station that is determined to require centralized monitoring by the determination unit. A data collection device that collects data by sequentially assigning a smaller number of lines than the number of slave stations to each slave station from a plurality of slave stations,
A designation means for designating an impact monitoring station that requires centralized monitoring among a plurality of slave stations,
Storage means for storing a collection time for collecting data for each slave station;
After determining the collection order for collecting data from the influence monitoring station designated by the designation means, the data is collected in order from the slave stations other than the influence monitoring station whose collection times are stored in the storage means in the oldest order. A determination means for determining a collection order;
A data collecting apparatus comprising: collecting means for collecting data from the slave stations in the collection order determined by the determining means. A data collection program that collects data by assigning a smaller number of lines than the number of slave stations to each slave station in order from a plurality of slave stations,
A storage step for storing a collection time at which data is collected for each slave station;
A determination step of determining a collection order in which a line is assigned earlier as a slave station having an older collection time stored in the storage step;
And a collection step of collecting data from the slave stations in the collection order determined in the determination step.

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